CN110022960A - For determining the device and method of the pollutional condition of the particulate filter in air cleaning facility - Google Patents
For determining the device and method of the pollutional condition of the particulate filter in air cleaning facility Download PDFInfo
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- CN110022960A CN110022960A CN201780073983.3A CN201780073983A CN110022960A CN 110022960 A CN110022960 A CN 110022960A CN 201780073983 A CN201780073983 A CN 201780073983A CN 110022960 A CN110022960 A CN 110022960A
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- sheet resistance
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- filter
- particulate filter
- humidity
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- 238000004140 cleaning Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002245 particle Substances 0.000 claims description 24
- 238000005259 measurement Methods 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 230000002209 hydrophobic effect Effects 0.000 claims description 7
- 230000001419 dependent effect Effects 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 235000013399 edible fruits Nutrition 0.000 claims description 2
- 239000000779 smoke Substances 0.000 description 17
- 239000012855 volatile organic compound Substances 0.000 description 9
- 235000019504 cigarettes Nutrition 0.000 description 7
- 230000000391 smoking effect Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
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- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0086—Filter condition indicators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/54—Computerised or programmable systems
Abstract
The present invention relates to one kind with the device and method for determining the pollutional condition of the particulate filter (10) for air cleaning facility (1), with the increased accuracy under lower extra cost.The equipment includes sheet resistance input (43), the sheet resistance information (21) of the electric sheet resistance for being indicated or being allowed determining particulate filter (10)；Humidity inputs (44), the humidity information (31) of the relative humidity of the environment for obtaining instruction filter；And processor (45), for under relative humidity (31) that is being indicated by humidity information obtained and being provided at the time of obtaining electric sheet resistance, electric sheet resistance that is being indicated by sheet resistance information (21) obtained or determining from sheet resistance information (21) obtained is compared with the reference sheet resistance of cleaning particulate filter, and the status information (42) based on the pollutional condition for comparing the control signal (41) for generating the control for air cleaning facility and/or instruction particulate filter (10).
Description
Technical field
The present invention relates to the device and method for determining the pollutional condition of the particulate filter in air cleaning facility.This
Outside, the present invention relates to air cleaning facilities.
Background technique
In addition to other than outdoor air ventilation, portable room air cleaner is increasingly being used at least partly purifying
The pollution particle and (odorous) gas of room air.Air purifier is joyous by the people's lived in megalopolis
It meets, the outdoor air of there may be heavily contaminated.Higher outdoor air pollution level does not fit through outdoor air
Ventilation carries out indoor air purification.
The task of air purifier first is that efficiently remove the particle in air caused by indoor smoking, gas (VOC,
Ozone, NO2) and smell.Smoking is the source of an especially severe of room air pollution.Air purifier is commonly provided with useful
In the corrugated fiber particulate filter for capturing (cigarette) particle from air, and for adsorbing VOC and their phase from air
Close active carbon (AC) filter of smell.In order to protect AC filter from the pollution of deposited particles, it is common practice to by AC
Filter is located in the downstream of particulate filter.This is but also AC filter can be captured immediately by burnt from the cigarette captured
The VOC of oil particles discharges and the gas and smell that discharge from particulate filter.For designing good fabric filter, for sky
The smoke particle that gas is propagated realizes that satisfactory filter efficiency is that there is no problem.However, passing through since cost and space limit
Identical level of efficiency will not usually be obtained for the AC filter of gas and smell.When upstream particle filter become gradually by
When smoke tar loads, it is likely to become serious odor contamination source, cannot fully handle it by the AC filter in downstream.
In ventilation unit and industrial filtration units, the terminal in particulate filter service life usually passes through monitoring due to accumulation
It is detected caused by dust across the increase of the pressure drop of filter.In contrast, the particulate filter service life in indoor air cleaner
Terminal it is usually related with smell discharge, rather than it is related with pressure drop increase, especially when from culinary art and/or burning (it is fried,
Smoking, stacte etc.) particle filtering be considered when.
JP2010-125414A1 discloses a kind of air filter, in the rate for the air for passing through air filter
The appropriate time for replacing air filter is detected before seriously reducing due to blocking.Air filter includes: to be pacified
In gas passage for filtering the air filter of gas, its pole S side be inserted into the first magnet in air filter,
It is positioned in the second magnet that the pole the N side at distance the first magnet preset distance is inserted into air filter, for detecting the
The resistance value detection device of resistance value between one magnet and the second magnet and for being lower than when the resistance value between two magnets
It determines that air filter is blocked between resistance value when predetermined value and determines the blocked blocking determining device of air filter.When
When the particle filtered includes iron particle, the presence of magnet is relevant and advantageous for the timely determination of plugged filter.
However, this is only encountered in industrial setting, and is not suitable for determining the service life of the particulate filter in indoor air cleaner,
Wherein the smell discharge from the particle filtered is more important than plugged filter.
WO2016/181210A2 discloses one kind for household electrical appliance (especially for drying/washing-fabric dryer)
Smart filter construction, for separating solid particle from liquid or gaseous fluid, smart filter construction includes weft and warp
The synthetic filaments precision fabrics material of line style, it is integrally associated with capacitance sensor, which is suitable for real-time measurement
Moisture value in the air-flow of textile material, to optimize the operation circulation of household electrical appliance.
WO2015/042960A1 discloses the method for the accumulation of the dust in the filter for detecting HVAC system and is
System.In one example, a kind of capacitive sensor system is provided.Capacitive sensor system is led including the first conductive mesh, second
Power grid, the first filter medium being arranged between the first conductive mesh and the second conductive mesh, and measurement is configured to by the first conduction
The circuit of the capacitor for the first capacitor sensor that net, the second conductive mesh and the first filter medium are formed.
US2002/059912A1 discloses a kind of gas handling system of internal combustion engine for motor vehicles comprising first into
Port and the second air inlet, the first air inlet are arranged at the point for being conducive to air inlet in the motor vehicle, the second air inlet quilt
One is arranged in not by the point that road is spraying and splashes.Two air inlets terminate at the common line being connected to internal combustion engine.?
First air inlet, humidity sensor are arranged.When water enter the first air inlet when, the humidity sensor issue activating solenoids with
The signal of mobile pivotable valve.In the first switching position, pivotable valve closes the second air inlet so that without air from
Second air inlet reaches pipeline.In the second position (shown in dotted line), pivotable valve closes the first air inlet, so that air
Pipeline is only reached by the second air inlet.
Summary of the invention
It is an object of the present invention to provide a kind of improved for determining the particulate filter for being used for air cleaning facility
Pollutional condition device and method, have the increased accuracy with lower extra cost.
It is a further object to provide corresponding air cleaning facilities.
In the first aspect of the invention, it proposes a kind of for determining the particulate filter for air cleaning facility
The equipment of pollutional condition, comprising:
Sheet resistance input is configured as the thin layer of electric sheet resistance for being indicated or being allowed determining particulate filter
Resistance information；
Humidity input is configured as obtaining the humidity information of the relative humidity of instruction filter environment；With
Processor is configured as: being indicated by humidity information obtained and in the acquisition electric sheet resistance
Under the relative humidity that moment provides, by it is being indicated by sheet resistance information obtained or from sheet resistance information obtained it is true
Fixed electric sheet resistance is compared with the reference sheet resistance of cleaning particulate filter, and based on the comparison, generates use
In the status information of the pollutional condition of the control signal and/or instruction particulate filter of the control of air cleaning facility.
In another aspect of this invention, a kind of air cleaning facility is proposed, comprising:
Particulate filter；
Sheet resistance measuring unit is configured as the electric sheet resistance of measurement particulate filter and generates instruction or permit
Perhaps the sheet resistance information of measured electric sheet resistance is determined；
Humidity measuring unit is configured as the relative humidity of measurement filter environment and generates the measured phase of instruction
To the humidity information of humidity；And
As disclosed herein for being determined based on generated sheet resistance information and humidity information generated
The equipment of the pollutional condition of grain filter.
At other aspect of the invention, a kind of corresponding method and a kind of computer program are provided, the computer journey
Sequence includes program code devices, for being performed on computers when the computer program, computer is caused to execute this paper
The step of disclosed method；It further include that storage computer program product is situated between in the computer-readable record of non-transitory wherein
Matter causes method disclosed herein that will be performed when computer program product is performed by processor.
The preferred embodiment of the present invention is defined in the dependent claims.It should be appreciated that claimed equipment, side
Method, computer program and medium have with claimed system (especially with limited in dependent claims and this paper institute
It is disclosed) similar and/or identical preferred embodiment.
The present invention is based on such ideas: obtain the information for being used for particulate filter, such as positioning indicator, the information according to
The measurement of the sheet resistance of the filter of Lai Yu within a certain period of time.Via the thin of the sheet resistance value about clean filter
Layer resistance measurement, the amount of the smoke tar in filter and time can be monitored.In the filter (such as by hydrophobic fiber material
Expect composition filter in) relative hydropathic smoke tar deposition, cause sheet resistance level of filter smog correlation
Decline.It is thin by the calibration data of the function as the smoke tar amount and time that are deposited appropriate about odor perception
The knowledge of layer resistance allows to determine the service life of particulate filter, and the smell emission level in the service life from filter is still
It is acceptable.
In addition, the knowledge of filter state allows for example to extend filter by the airflow rate of filter by controlling
Service life.The airflow rate of reduction reduces volatile organic compounds (VOC) rate of discharge from the smoke tar deposited, and
The efficiency of filter is increased to remove the VOC/ smell of discharge from air.When smoke tar aging, filtered cigarette is come from
The VOC rate of release of particle is gradually reduced.
This also allows one mode, for example, at night or when nobody is in the room of air cleaning facility, it is hollow
Gas cleaning equipment is operated with the air flowing of reduction, to desorb VOC from particulate filter, is then absorbed by active carbon.Only
Have when needed, this mode could be automatically selected according to the sheet resistance change detected.
Therefore, according to the present invention, the existing knowledge of limited amount smoke tar can be provided in filter, for example, logical
Cross filter status indicator.It can be used for about it by the knowledge of the filter state of the loading level of (aging) smoke tar
Purpose is fed back, for extending the particulate filter service life, and for the transmission when the smell discharge of filter becomes unacceptable
The signal of the terminal of filter life.
The information can additionally be used in the service model in for example professional solution, wherein estimation filter is surplus
Remaining operation lifetime (before it generates undesirable odor) is important.This allows the maintenance scheme optimized.
In addition, the present invention allows to optimize clarifier in the case where uncomfortable caused by generating by direct smog and smell
Operation.When smoking, air purifier can be operated while also generating smell, and when not smoking,
It can choose different operation modes, prevent or reduce smell generation.
According to preferred embodiment, the processor is configured to relatively generating fiducial value by described, and only described
When fiducial value is more than predetermined pollution threshold, status information and/or control signal are just generated.Therefore, if being less than pollution threshold,
It does not take any action then.Threshold value can be obtained ahead of time, for example, by test or simulation, and be set in a device, such as
For example it is arranged based on application program by manufacturer or by consumer.In this way, equipment can be customized.
In another embodiment, the processor is configured to by being indicated by sheet resistance information obtained or
By the electric sheet resistance determined from sheet resistance information obtained and the ratio or difference with reference between sheet resistance
Value generates the fiducial value.It is simple but efficient that this provides the one kind whether determining fiducial value and pollution threshold are exceeded
Method.
The processor can be additionally configured to: based on being indicated by humidity information obtained and obtaining the electricity
The relative humidity provided at the time of sheet resistance, uses predetermined pollution threshold.Accordingly, there exist can be used for different relative humidity
Various threshold values, and based on the humidity actually provided, corresponding threshold value is used as with reference to and is selected.This further improves pollution
The accuracy of the determination of state.
The processor can be additionally configured to the degree according to the fiducial value more than predetermined pollution threshold, generate different
Status information and/or different control signals.Therefore, which can control the content of status information, for example, the police of warning
It accuses rank or recommends the type of the movement of user, and/or the type of the control executed in response to control signal.
In another embodiment, the processor is configured to according to the fiducial value be more than predetermined pollution threshold journey
Degree generates control signal, which is used to control the fan for generating the air-flow by particulate filter, especially such as
The predetermined pollution threshold of fruit is gradually more than then to gradually decrease air-flow for controlling fan；Or if predetermined pollution threshold is surpassed
It crosses, then reduces air-flow for controlling fan.With the increase of the pollution level of filter, which reduce the rows of undesirable smell
It puts.
In yet another embodiment, the processor is configured to generating status information, which indicates particle filter
Life expectancy of wave device, particle filter pollution estimation degree and to particulate filter using and/or replacement it is relevant
One or more of recommend.Therefore, the type of information can be set in user or manufacturer.In addition, the information all or one
A little aspects can be generated and issue or be provided for for example to be published by custom menu.
Disclosed air cleaning facility includes particulate filter, the electrical sheet resistance for measuring particulate filter
And for generating instruction or allowing to determine the sheet resistance measuring unit of measured electric sheet resistance, for measuring filter
The humidity measuring unit of the relative humidity of environment and the humidity information for generating the measured relative humidity of instruction and such as
The upper pollutional condition for determining particulate filter based on the sheet resistance information of generation and the humidity information of generation
Equipment.This air cleaning facility can be fixed or mobile device.
In one embodiment, air cleaning facility may also include electrode structure, be disposed in the table of particulate filter
On face or be disposed in particulate filter towards enter air-flow surface on additional filter patch on.This makes particle
The electric sheet resistance of filter can well be measured in a manner of low cost.Therefore, electrode structure may include two intersections
Finger electrode allows accurately measurement.
In addition, in one embodiment, the sheet resistance measuring unit may include for applying voltage to first electrode
Voltage source and for measuring the voltage measurement unit for being connected to the voltage at load resistance both ends of second electrode, wherein handling
Device is configured true according to the dimensional parameters of the voltage, measured voltage, load resistance and two interdigital electrodes that are applied
Determine sheet resistance information.This makes it possible to measure electrical sheet resistance in simple and cost-effective mode.
Although various types of particulate filters usually can be used, in a preferred embodiment, the particulate filter
Including hydrophobic fiber filtering material.
Air cleaning facility may also include the fan for generating the air-flow for passing through particulate filter, wherein the equipment
Processor is configured as generating the control signal for controlling the fan.In this way it is possible to according to the pollution of filter
State dynamically controls the air-flow by filter.
Detailed description of the invention
With reference to the embodiments described below, these and other aspects of the invention will become obvious and be illustrated.
In the following figures
Fig. 1 shows the schematic diagram of the embodiment of air cleaning facility according to the present invention,
Fig. 2 shows according to the present invention for determining the signal of the embodiment of the equipment of the pollutional condition of particulate filter
Figure,
Fig. 3 shows bowing for the embodiment of particulate filter according to the present invention and the embodiment of sheet resistance measuring unit
View, and
Fig. 4 shows the measured value of the electric sheet resistance of the filter of cleaning and pollution with the variation diagram of humidity.
Specific embodiment
Fig. 1 shows the schematic diagram of the embodiment of air cleaning facility 1 according to the present invention.It includes particulate filter
10, sheet resistance measuring unit 20, humidity measuring unit 30 and equipment 40, equipment 40 are used to believe based on generated sheet resistance
It ceases with generated humidity information and determines the pollutional condition of particulate filter 10.Optionally, air cleaning facility further includes using
In the fan 50 for generating the air-flow by particulate filter 10.
Particulate filter 10 can be fibrous particle filter, and can be made of hydrophobic fiber filtering material.It is thin
Layer resistance measurement unit 20 is configured as the electric sheet resistance of measurement particulate filter 10, and (it is usually the thin of nominal uniform thickness
The measurement of the resistance of film) and sheet resistance information 21 is generated, which indicates or allows to determine measured electricity
Sheet resistance.Sheet resistance and its measurement are commonly known in the art, and sheet resistance is the film of nominal uniform thickness
The measurement of resistance.Humidity measuring unit 30 is configured as the relative humidity of the environment of measurement filter, the environment of the filter
E.g. indicate around the filter or region of neighbor filter (for example, at a distance of a certain maximum distance, all such as less than 100cm are excellent
Choosing be less than 50cm, more preferably less than 25cm) filter direct environment, and humidity measuring unit 30 be configured as generate refer to
Show the humidity information 31 of measured relative humidity.
Equipment 40 is specifically configured to for generating: for air cleaning facility 1 (such as control air cleaning facility 1
Optional fan 50) control control signal 41, and/or instruction particulate filter 10 pollutional condition status information
42.One embodiment of equipment 40 is described in Fig. 2.Equipment 40 includes: for obtaining and (receiving or obtain) sheet resistance
The sheet resistance input 43 of information 21, for obtaining and (receiving or obtain) the humidity input 44 of humidity information 31, and processing
Device 45.Processor 45 is configured as: being indicated by humidity information 31 obtained and in the acquisition electric sheet resistance
Under the relative humidity that moment provides, by it is being indicated by sheet resistance information 21 obtained or from sheet resistance obtained believe
The reference sheet resistance 22 of electric sheet resistance and clean particulate filter that breath 21 determines is compared, and is based on the ratio
Compared with the state of the pollutional condition of the control signal 41, and/or instruction particulate filter of the control generated for air cleaning facility
Information 42, wherein status information 42 can for example show or otherwise be issued to be received by user.
Equipment 40 can use hardware and/or software realization, for example, as corresponding programmable microprocessor or calculating
Machine.
Fig. 3 shows the embodiment of particulate filter 10 according to the present invention and the embodiment of sheet resistance measuring unit 20
Top view.Particulate filter 10 includes filtering material 11 (for example, hydrophobic fiber filtering material), for from across filtering material
Particle (especially smoke particle and culinary art aerosol) is captured in 11 air.In addition, electrode structure 12 is disposed in particle filtering
On the surface 13 of device 10, or it is disposed in other filter patch (not shown), for example individual hydrophobic fiber filter patch
On piece, the filter patch are disposed on the surface 13 towards entrance air-flow of particulate filter 11.
The electrode structure 12 of the embodiment includes two groups of interdigital electrodes 121,122.Electrode group 121,122 only needs to cover
(small) part for lid filter surfaces 13.Sheet resistance measuring unit 20 includes voltage source 22, to mention to an electrode group 121
For (DC) voltage Vs.Thus the electric current I generated between electrode group 121,122s, from by measuring unit 23 measure by second group
Electrode 122 is connected to the load resistance R of ground potentialLBoth ends voltage VmeasAnd it obtains.Here, Vmeas=Is×RL.Filter
The sheet resistance of 10 (or the additional filter patches for carrying electrode structure in embodiment)It is from measured voltage Vmeas
Obtained from according to the following formula.
Accordingly, N is the quantity (N=3 in this exemplary embodiment) of the electrode branches in electrode group, and L is electrode branches
Length, and d is the interval between adjacent electrode.In one embodiment, the field strength E between adjacent electrodes=Vs/ d is preferred
Ground is maintained at Es≤ 0.1kV/mm is to avoid corona discharge.By increasing RL, L and/or N are about VmeasMeasurement sensitivity can
To be increased.
As described above, the sheet resistance of filter 10It can be or thin by being provided at by the processor 45 of equipment 40
The individual computing unit separated in layer measuring unit 20 or with thin layer measuring unit 20 is calculated according to different parameters.
Using device shown in Fig. 3, for clean filterWith the filter of pollutionIn the measured value quilt in the discribed figure of Fig. 4 of the electric sheet resistance under different relative humidity (RH)
It obtains.The filter of pollution is and is used at it by the measurement of the electric sheet resistance after the load of a certain amount of cigarette smoke
Filter is identical or the filter of identical type.ValueWithWith the increase of humidity RH
It reduces, this is because it reduce sheet resistances in the case where higher RH is horizontal due to the increased water adsorption of smoke tar.It is worth noting
, really hydrophobic cleaning filter should have hardly depending on the RH's up to RH=95%It is bent
Line.Due to being only the aquation of smoke tar, this will amplificationIn variation.
In Fig. 4, with 1m2The smog of 400 cigarette is deposited on RH=in the full-scale filter of filter area
Make within the scope of 40% or more RHReduce about an order of magnitude.In RH≤40%,Become
Amount dependent on the smog in filter relatively fewerly.After rinsing at least several hours of filter containing cigarette using clean air,It is observed the VOC release for the smoke tar for carrying out auto-deposition and is slowly increased.Increase and came from
The smell discharge of filter gradually decreases while occurring
Based on above data and observation, the Exemplary metrology f (RH, t) for assessing filter state be can be defined as
For clean filter, f (RH, t)=0.Factor f (RH, t) with smoke tar amount in filter increase
And increase, but reduced again after filter is rinsed long-time using clean air.From the gas for the filter for being exposed to smog
Sense of taste knows experiment, can establish maximum value fmax(RH), in maximum value fmax(RH) reach the terminal of filter life at.This
Outside, the smell discharge for judging filter is unacceptable, Ying Genghuan filter.In addition, maximum air filtration time tmaxIt can be with
It is estimated, thinks that filter has been used to the anyway all recommended of its replacement after the maximum air filtration time
Degree, but regardless of in filter smoke tar accumulation how.For example, when particle removal clean air transfer rate (CADR) is than new
When the CADR of filter is twice small.
Information about measured RH and f (RH, t) is received as input by equipment 40, and it is net that equipment 40 can be air
Change a part of device controller or is configured as air purifier controller.In response, equipment 40 can be according to being explained above
Scheme issue filter state message and/or adjustment passes through the airflow rate of filter.When particulate filter 10 discharge it is limited
When the smell of amount, flow velocity reduction enhances the smell removal efficiency for the AC filter for being located in particulate filter downstream, this will make
The smell discharged from air purifier is reduced to almost nil.
In one embodiment, algorithm can be used, using the algorithm, the control of equipment 40 passes through the air-flow of filter 10
And/or issued state message.Know firstly, the algorithm is depended on about RHMeasured value input.Secondly,
It depends on the data tested from separate calibrations, such astmax, fmax(RH) and as f's (RH, t)
The odour intensity of the perception of function.Mild smell discharge and value f (RH, t)≤χ (RH) fmax(RH) it is associated, and the gas of appropriateness
Taste discharge and f (RH, t) > χ (RH) fmax(RH) it is associated, wherein χ (RH) is the score pre-established.As long as 0≤f (RH, t)
≤fmin(RH), filter is regarded as (almost) clean filter.Different RH water can be determined from independent calibration experiments
F under flatmin(RH) value.In general,.
Exemplary algorithm can be as follows:
If f (RH, t)≤fmin(RH)
Status information: " clean filter "
Airflow rate: without limitation；
If fmin(RH)≤f (RH, t)≤χ (RH) fmax(RH) and t < tmax
Status information: " filter of slight pollution "
Airflow rate: without limitation；
If fmin(RH)≤f (RH, t)≤χ (RH) fmax(RH) and t >=tmax
Status information: " filter replacement is recommended "
Airflow rate: without limitation；
χ if (RH) fmax(RH)≤f (RH, t)≤fmax(RH) and t < tmax
Status information: " filter of medium pollution "
Airflow rate: airflow rate is moderately reduced from maximum airflow rate；
χ if (RH) fmax(RH)≤f (RH, t)≤fmax(RH) and t >=tmax
Status information: " filter replacement is recommended "
Airflow rate: airflow rate is significantly reduced from maximum airflow rate；
If f (RH, t) > fmax(RH)
Status message: " filter replacement is recommended "
Airflow rate: airflow rate is significantly reduced from maximum airflow rate.
It therefore, in one embodiment, is more than the degree of predetermined pollution threshold according to fiducial value, to generate status information
And/or for controlling the control signal for being used for generating the airflow fan by particulate filter.Therefore, fiducial value from:
Under relative humidity 31 that is being indicated by humidity information obtained and being provided at the time of obtaining the electric sheet resistance, by institute
It is that the sheet resistance information 21 of acquisition indicates or thin by the determining electric sheet resistance of sheet resistance information 21 obtained and reference
The comparison of layer resistance.For example, control signal can be generated and make: if predetermined pollution threshold is by the degree to gradually increase
It and is gradually more than that then fan is gradually decreasing air-flow.Alternatively, if it exceeds predetermined pollution threshold, it can simply for example
Air-flow is reduced step by step or in a single step.
In general, such fiducial value (can be above-mentioned function) can be used to only be more than predetermined pollution in the fiducial value
Status information and/or control signal are generated when threshold value, which can be the particle mistake of each model by manufacturer
Filter or air cleaning facility setting.Fiducial value generates so as a result, that is, by being formed by sheet resistance obtained
It the electric sheet resistance that is information instruction or being determined by sheet resistance information obtained and described refers between sheet resistance
Ratio or difference.
For different rh values, there may also be the tables of multiple predetermined pollution thresholds, and can be based on real
The given humidity value in border determines correct pollution threshold from table.Instead of table, formula or function can be defined, based on real
Pollution threshold is arranged in the given humidity value in border.
Using the present invention, filtration efficiency, the minimum smell discharge from filter can be obtained and maximize filtering
Balance between the demand in device service life.The information can also be used for the service model in for example professional solution with being attached,
Wherein estimate that the remaining life (before it generates undesirable odor) of filter is important, and information permission is excellent
The maintenance scheme of change.
In addition, the present invention allows to optimize clarifier in the case where uncomfortable caused by generating by direct smog and smell
Operation.When smoke occur when, air purifier can also generate smell (discomfort of direct smog is bigger) while and
It is operated.When there is no smoking, it can choose different operation modes, prevent or reduce the cigarette in particulate filter
The smell of tar emission generates.
The present invention can be used in by from air absorb pollutant and by filter itself generate smell institute it is in love
In condition, that is, it can also be used for being originated from and burn joss sticks, cook or the air pollutants of (depth) frying.
It is such to illustrate and retouch although illustrating and describing the present invention in detail in the drawings and the preceding description
It is considered illustrative or exemplary and not restrictive for stating；The present invention is not limited to the disclosed embodiments.It is attached by studying
Figure, disclosure and appended claims, those skilled in the art are understood that when practicing invention claimed and reality
Other modifications of existing disclosed embodiment.
In the claims, word " comprising " is not excluded for other elements or step, and indefinite article "a" or "an"
It is not excluded for multiple.The function of several recorded in claim may be implemented in discrete component or other units.Mutually different
Dependent claims in state that the only fact of certain measures is not offered as the combinations of these measures and cannot be used for benefiting.
Computer program can be stored/distributed in suitable non-transitory medium, such as optical storage medium or with
The solid state medium that other hardware provide together or a part as other hardware provides, but can also be distributed otherwise,
Such as pass through internet or other wired or wireless telecommunication systems.
Any appended drawing reference in claim is not necessarily to be construed as limitation protection scope.
Claims (14)
1. a kind of equipment for determining the pollutional condition of the particulate filter in air cleaning facility, the equipment include:
Sheet resistance inputs (43), is configured as obtaining sheet resistance information (21), the sheet resistance information instruction or permission
Determine the electric sheet resistance of the particulate filter (10)；
Humidity inputs (44), is configured as obtaining humidity information (31), the humidity information indicates the environment of the filter
Relative humidity；And
Processor (45), is configured as: being indicated by humidity information obtained and in the acquisition electric sheet resistance
It is will being indicated by sheet resistance information (21) obtained or from obtained thin under the relative humidity (31) that moment provides
The electric sheet resistance that layer resistance information (21) determines is compared with the reference sheet resistance of clean particulate filter, with
And the control signal (41), and/or the instruction particle of the control for the air cleaning facility are generated based on the comparison
The status information (42) of the pollutional condition of filter (10).
2. equipment as described in claim 1,
Wherein the processor (45) is configured as: fiducial value is generated by the comparison, and only super in the fiducial value
Status information and/or control signal are generated when crossing predetermined pollution threshold.
3. equipment as claimed in claim 2,
Wherein the processor (45) is configured as: by being indicated by sheet resistance information obtained or by obtained
The electric sheet resistance that sheet resistance information determines and described with reference to forming ratio or difference between sheet resistance to generate
State fiducial value.
4. equipment as claimed in claim 2,
Wherein the processor (45) is configured as: based on it is being indicated by humidity information obtained and obtaining the electricity it is thin
The relative humidity provided at the time of layer resistance uses predetermined pollution threshold.
5. equipment as claimed in claim 2,
Wherein the processor (45) is configured as: being more than the degree of the predetermined pollution threshold dependent on the fiducial value, produces
Raw different status information and/or different control signals.
6. equipment as described in claim 1,
Wherein the processor (45) is configured as: generating dependent on the degree that the fiducial value is more than the predetermined pollution threshold
Signal is controlled, the control signal is used to control the fan for generating the air-flow by the particulate filter, especially such as
Predetermined pollution threshold described in fruit is gradually more than then to gradually decrease the air-flow for controlling the fan, or if described
Predetermined pollution threshold is exceeded, then reduces the air-flow.
7. equipment as described in claim 1,
Wherein the processor (45) is configured as: generating the life expectancy for indicating the particulate filter, the particle filtering
One or more of the estimation degree of the pollution of device and recommendation relevant to the use and/or replacement of the particulate filter
Status information.
8. a kind of air cleaning facility, comprising:
Particulate filter (10)；
Sheet resistance measuring unit (20), is configured as: measuring the electric sheet resistance of the particulate filter (10), and generates
Sheet resistance information (21), the sheet resistance information (21) indicate or allow to determine measured electric sheet resistance；
Humidity measuring unit (30), is configured as: measuring the relative humidity of the environment of the filter, and generates instruction and surveyed
The humidity information (31) of the relative humidity of amount；And
Equipment (40) as described in claim 1, the equipment are used for based on generated sheet resistance information (21) and are produced
Raw humidity information (31) determines the pollutional conditions of the particulate filter (10).
9. air cleaning facility as claimed in claim 8,
Further include electrode structure (12), the electrode structure be disposed on the surface (13) of the particulate filter (10) or
It is disposed on the additional filter patch on the surface towards entrance air-flow of the particulate filter, particularly the electrode
Structure (12) includes two interdigital electrodes (121,122).
10. air cleaning facility as claimed in claim 9,
Wherein the sheet resistance measuring unit (20) includes voltage source (22) and voltage measurement unit (23), and the voltage source is used
In to first electrode (121) apply voltage (VS), the voltage measurement unit is connected to the second electrode for measuring
(122) load resistance (RL) both ends voltage (Vmeas), wherein the processor (45) is configured as: according to the electricity applied
The dimensional parameters of pressure, measured voltage, the load resistance and described two interdigital electrodes (121,122) determine
The sheet resistance information (31).
11. air cleaning facility as claimed in claim 8,
Wherein the particulate filter (10) includes hydrophobic fiber filtering material (11).
12. air cleaning facility as claimed in claim 8,
It further include the fan (50) for generating the air-flow by the particulate filter (10), wherein the institute of the equipment (40)
Processor (45) is stated to be configured as generating the control signal (41) for controlling the fan.
13. a kind of method for determining the pollutional condition of the particulate filter in air cleaning facility, which comprises
It obtains sheet resistance information (21), the sheet resistance information instruction or the electricity for allowing to determine the particulate filter (10)
Sheet resistance；
It obtains humidity information (31), the humidity information indicates the relative humidity of the environment of the filter；
Being indicated by humidity information obtained (31) and provide at the time of obtaining the electric sheet resistance relatively wet
Under degree, will by sheet resistance information (21) obtained indicate or by sheet resistance information (21) obtained determine it is described
Electric sheet resistance is compared with the reference sheet resistance of clean particulate filter；And
Generation is for the control signal (41) of the control of the air cleaning facility, and/or instruction described based on the comparison
The status information (42) of the pollutional condition of grain filter (10).
14. a kind of computer program, including program code devices, for being performed on the computer when computer program
When, the step of causing the computer to execute method as described in claim 13.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16201456 | 2016-11-30 | ||
| EP16201456.7 | 2016-11-30 | ||
| PCT/EP2017/080136 WO2018099789A1 (en) | 2016-11-30 | 2017-11-23 | Device and method for determining the pollution status of a particle filter in an air-cleaning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110022960A true CN110022960A (en) | 2019-07-16 |
| CN110022960B CN110022960B (en) | 2021-10-15 |
Family
ID=57737537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780073983.3A Active CN110022960B (en) | 2016-11-30 | 2017-11-23 | Device and method for determining the state of contamination of a particle filter in an air cleaning device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US11617979B2 (en) |
| EP (1) | EP3548159A1 (en) |
| CN (1) | CN110022960B (en) |
| WO (1) | WO2018099789A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336689A (en) * | 2020-03-19 | 2020-06-26 | 华帝股份有限公司 | Scale inhibition and alarm water inlet valve, gas water heater using scale inhibition and alarm water inlet valve and control method |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3548159A1 (en) | 2019-10-09 |
| CN110022960B (en) | 2021-10-15 |
| US20200179858A1 (en) | 2020-06-11 |
| WO2018099789A1 (en) | 2018-06-07 |
| US11617979B2 (en) | 2023-04-04 |
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